Tech items such as smartwatches and iPhones have been getting the bling treatment for years, so it was inevitable that jewellers would track a new lucrative category – wearable wellness devices. Billie Simone ring jacket. An early adopter of the Oura ring , she noticed that the gold version didn’t match the shade of her real gold jewellery. After styling it with two diamond eternity bands, she was inspired to create her patent-pending ring jacket. Billie Simone’s ring jacket is designed to fit an Oura ring.